2007 TOYOTA SIENNA Service Repair Manual

trunk oil reset horn washer fluid warning dead battery

Page 2905 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AC–164AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Manual Air Conditioning System)
AC
TERMINALS OF ECU
1. A/C AMPLIFIER
HINT:
Check from the rear of the connector while it is
connected to th

AC–164AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Manual Air Conditioning System)
AC
TERMINALS OF ECU
1. A/C AMPLIFIER
HINT:
Check from the rear of the connector while it is
connected to the A/C amplifier.
E145189E02
Terminal No.
(Symbols)Wiring Color Description Condition Specified Condition
A9-1 (S5) - A9-26 (SG) BR-R - LG-RPower supply for air mix
control damper position
sensorIgnition switch: ON 4.5 to 5.5 V
A9-3 (TE) - A9-7 (SG-4) G-B - YA/C evaporator
temperature sensor signalIgnition switch: ON
Evaporator temperature:
0
C (32F)2.0 to 2.4 V
A9-3 (TE) - A9-7 (SG-4) G-B - YA/C evaporator
temperature sensor signalIgnition switch: ON
Evaporator temperature:
15
C (59F)1.4 to 1.8 V
A9-4 (MPX+) - Body
groundV - Body groundMultiplex communication
systemMultiplex communication
circuitPulse generation
A9-5 (MPX-) - Body
groundR-L - Body groundMultiplex communication
systemMultiplex communication
circuitPulse generation
A9-6 (GND) - Body ground W-B - Body groundGround for main power
supplyAlways Below 1 V
A9-7 (SG-4) - Body
groundY - Body groundGround for A/C evaporator
temperature sensorAlways Below 1 V
A9-8 (FTIN) - A9-6 (GND) B-O - W-BMode control switch
operation signalIgnition switch: ON
Rear mode control switch
(FOOT): OFF4.5 to 5.5 V
A9-8 (FTIN) - A9-6 (GND) B-O - W-BMode control switch
operation signalIgnition switch: ON
Rear mode control switch
(FOOT): ONBelow 1 V
A9-9 (BLIN) - A9-6 (GND) W - W-BMode control switch
operation signalIgnition switch: ON
Rear mode control switch
(B/L): OFF4.5 to 5.5 V
A9-9 (BLIN) - A9-6 (GND) W - W-BMode control switch
operation signalIgnition switch: ON
Rear mode control switch
(B/L): ONBelow 1 V
A9-10 (FCIN) - A9-6
(GND)BR-B - W-BMode control switch
operation signalIgnition switch: ON
Rear mode control switch
(FACE): OFF4.5 to 5.5 V
A9-10 (FCIN) - A9-6
(GND)BR-B - W-BMode control switch
operation signalIgnition switch: ON
Rear mode control switch
(FACE): ONBelow 1 V
A9-11 (RDSW) - A9-6
(GND)Y- G - W - BRear defogger operation
signalIgnition switch: ON
REAR DEF switch: OFF4.5 to 5.5 V
A9-11 (RDSW) - A9-6
(GND)Y- G - W - BRear defogger operation
signalIgnition switch: ON
REAR DEF switch: ONBelow 1 V

Page 2906 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Manual Air Conditioning System)AC–165
AC
A9-12 (SOL+) - A9-6
(GND)W-L - W-BA/C compressor operation
signalEngine is runningA/C
switch: ON
Front

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Manual Air Conditioning System)AC–165
AC
A9-12 (SOL+) - A9-6
(GND)W-L - W-BA/C compressor operation
signalEngine is runningA/C
switch: ON
Front blower control dial:
LOPulse generation
(See waveform 1)
A9-13 (AOD) - A9-6
(GND)G-O - W-BAir outlet control servo
motor operation signalIgnition switch: ON
Front mode control dial:
FOOTBelow 1 V
A9-13 (AOD) - A9-6
(GND)G-O - W-BAir outlet control servo
motor operation signalIgnition switch: ON
Front mode control dial:
DEF11 to 14 V
A9-14 (AOF) - A9-6 (GND) L-O - W-BAir outlet control servo
motor operation signalIgnition switch: ON
Front mode control dial:
DEFBelow 1 V
A9-14 (AOF) - A9-6 (GND) L-O - W-BAir outlet control servo
motor operation signalIgnition switch: ON
Front mode control dial:
FOOT11 to 14 V
A9-15 (FOOT) - A9-6
(GND)G-Y - W-BRear air outlet control
servo motor operation
signalIgnition switch: ON
Rear mode control switch
(FOOT): OFFBelow 1 V
A9-15 (FOOT) - A9-6
(GND)G-Y - W-BRear air outlet control
servo motor operation
signalIgnition switch: ON
Rear mode control switch
(FOOT): ON11 to 14 V
A9-16 (FACE) - A9-6
(GND)LG-B - W-BRear air outlet control
servo motor operation
signalIgnition switch: ON
Rear mode control switch
(FACE): OFFBelow 1 V
A9-16 (FACE) - A9-6
(GND)LG-B - W-BRear air outlet control
servo motor operation
signalIgnition switch: ON
Rear mode control switch
(FACE): ON11 t o 1 4 V
A9-17 (+B) - A9-6 (GND) W-L - W-B Power source (Battery) Always 11 to 14 V
A9-18 (IG) - A9-6 (GND) R-Y - W-B Power source (IG) Ignition switch: OFF Below 1 V
A9-18 (IG) - A9-6 (GND) R-Y - W-B Power source (IG) Ignition switch: ON 11 to 14 V
A9-19 (MHH) - A9-6
(GND)V- Y - W- BRear air mix control servo
motor operation signalIgnition switch: ON
Rear temperature control
dial: MAX COLDBelow 1 V
A9-19 (MHH) - A9-6
(GND)V- Y - W- BRear air mix control servo
motor operation signalIgnition switch: ON
Rear temperature control
dial: MAX HOT11 t o 1 4 V
A9-20 (MCH) - A9-6
(GND)GR-L - W-BRear air mix control servo
motor operation signalIgnition switch: ON
Rear temperature control
dial: MAX HOTBelow 1 V
A9-20 (MCH) - A9-6
(GND)GR-L - W-BRear air mix control servo
motor operation signalIgnition switch: ON
Rear temperature control
dial: MAX COLD11 to 14 V
A9-21 (S5) - A9-6 (GND) B-W - W-BPower supply for mode
control switchIgnition switch: ON 4.5 to 5.5 V
A9-22 (S5-1) - A9-27 (SG-
1)P-L - GR-LPower supply for air outlet
control damper position
sensorIgnition switch: ON 4.5 to 5.5 V
A9-23 (S5) - A9-6 (GND) P-L - W-BPower supply for rear air
outlet control damper
position sensorIgnition switch: ON 4.5 to 5.5 V
A9-24 (TSET) - A9-6
(GND)R-G - W-BRear temperature control
dial operation signalIgnition switch: ON
Rear temperature control
dial: ON0 to 5 V
A9-25 (BSET) - A9-6
(GND)GR-G - W-BRear blower control dial
operation signalIgnition switch: ON
Rear blower control dial:
ON0 to 5 V
A9-26 (SG) - Body ground LG-R - Body groundGround for air mix control
damper position sensorAlways Below 1 V Terminal No.
(Symbols)Wiring Color Description Condition Specified Condition

Page 2907 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AC–166AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Manual Air Conditioning System)
AC
A9-27 (SG-1) - Body
groundGR-L - Body groundGround for air outlet
control damper position
sensorAlways

AC–166AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Manual Air Conditioning System)
AC
A9-27 (SG-1) - Body
groundGR-L - Body groundGround for air outlet
control damper position
sensorAlways Below 1 V
A9-28 (SG) - Body ground V-W - Body groundGround for rear A/C
control assemblyAlways Below 1 V
A9-29 (SG) - Body ground W-R - Body groundGround for rear air outlet
control damper position
sensorAlways Below 1 V
A9-30 (SG-6) - Body
groundW-G - Body groundGround for A/C lock
sensor, A/C pressure
sensor and A/C ambient
temperature sensorAlways Below 1 V
A9-35 (THOT) - A9-6
(GND)L-B - W-BAir mix control servo motor
operation signalIgnition switch: ON
Front temperature control
dial: MAX. COLDBelow 1 V
A9-35 (THOT) - A9-6
(GND)L-B - W-BAir mix control servo motor
operation signalIgnition switch: ON
Front temperature control
dial: MAX. HOT11 to 14 V
A9-36 (TCOL) - A9-6
(GND)P-G - W-BAir mix control servo motor
operation signalIgnition switch: ON
Front temperature control
dial: MAX. HOTBelow 1 V
A9-36 (TCOL) - A9-6
(GND)P-G - W-BAir mix control servo motor
operation signalIgnition switch: ON
Front temperature control
dial: MAX. COLD11 to 14 V
A9-38 (A/CB) - A9-6
(GND)B - W-B Power source (Battery)Ignition switch: ON
Front blower control dial:
OFFBelow 1 V
A9-38 (A/CB) - A9-6
(GND)B - W-B Power source (Battery)Ignition switch: ON
Front blower control dial:
ON11 to 14 V
A9-40 (ACC) - A9-6 (GND) P - W-B Power source (ACC) Ignition switch: OFF Below 1 V
A9-40 (ACC) - A9-6 (GND) P - W-B Power source (ACC) Ignition switch: ACC 11 to 14 V
A10-2 (LOCK) - A9-30
(SG-6)L - W-G A/C lock sensor signalEngine is running
Front blower control dial:
LO
A/C switch: ONPulse generation
(See waveform 2)
A10-6 (BLWC) - A9-6
(GND)L-W - W-BRear blower motor
operation signalIgnition switch: ON
Rear blower control dial:
ON1.7 to 2.0 V
A10-7 (VMC) - A9-6
(GND)P-B - W-BRear blower motor
operation signalIgnition switch: ON
Rear blower control dial:
ON0 to 9 V
A10-9 (TAM) - A9-30 (SG-
6)
B-R - W-GA/C ambient temperature
sensor signalIgnition switch: ON
Ambient temperature:
25C (77F)1.35 to 1.75 V
A10-9 (TAM) - A9-30 (SG-
6)B-R - W-GA/C ambient temperature
sensor signalIgnition switch: ON
Ambient temperature:
40
C (104F)0.85 to 1.25 V
A10-10 (PRE) - A9-30
(SG-6)V - W-GA/C pressure sensor
signalStart engine
Operate A/C system
Refrigerant pressure:
Abnormal pressure (more
than 3140 kPa (32.0 kgf/
cm
2, 455 psi))4.74 V or higher
A10-10 (PRE) - A9-30
(SG-6)V - W-GA/C pressure sensor
signalStart engine
Operate A/C system
Refrigerant pressure:
Abnormal pressure (less
than 196 kPa (2.0 kgf/cm
2,
28 psi))Below 0.76 V Terminal No.
(Symbols)Wiring Color Description Condition Specified Condition

Page 2908 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Manual Air Conditioning System)AC–167
AC
(a) Waveform 1:
A10-10 (PRE) - A9-30
(SG-6)V - W-GA/C pressure sensor
signalStart engine
Operate A/C sy

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Manual Air Conditioning System)AC–167
AC
(a) Waveform 1:
A10-10 (PRE) - A9-30
(SG-6)V - W-GA/C pressure sensor
signalStart engine
Operate A/C system
Refrigerant pressure:
Normal pressure (less
than 3140 kPa (32.0 kgf/
cm
2, 455 psi) and more
than 196 kPa (2.0 kgf/cm2,
28 psi))0.76 to 4.74 V
A10-11 (TPO) - A9-27
(SG-1)LG - GR-LAir outlet control damper
position sensor signalIgnition switch: ON
Front mode control dial:
FOOT
DEF1.0 to 4.0 V
A10-12 (TP) - A9-26 (SG) L-R - LG-RAir mix control damper
position sensor signalIgnition switch: ON
Front temperature control
dial: MAX. HOT
MAX.
COLD1.0 to 4.0 V
A10-19 (REC) - A9-6
(GND)GR-R - W-BAir inlet control servo
motor operation signalIgnition switch: ON
R/F switch: FRESHBelow 1 V
A10-19 (REC) - A9-6
(GND)GR-R - W-BAir inlet control servo
motor operation signalIgnition switch: ON
R/F switch:
RECIRCULATION11 to 14 V
A10-20 (FRS) - A9-6
(GND)W-L - W-BAir inlet control servo
motor operation signalIgnition switch: ON
R/F switch:
RECIRCULATIONBelow 1 V
A10-20 (FRS) - A9-6
(GND)W-L - W-BAir inlet control servo
motor operation signalIgnition switch: ON
R/F switch: FRESH11 to 14 V
A10-21 (HRC) - A9-6
(GND)R-G - W-BRear blower motor
operation signalIgnition switch: ON
Rear blower control dial:
OFF11 to 14 V
A10-21 (HRC) - A9-6
(GND)R-G - W-BRear blower motor
operation signalIgnition switch: ON
Rear blower control dial:
ONBelow 1 V
A10-22 (MGC) - A9-6
(GND)R-L - W-BA/C compressor magnetic
clutch relay operation
signalIgnition switch: ON
A/C switch: OFF11 t o 1 4 V
A10-22 (MGC) - A9-6
(GND)R-L - W-BA/C compressor magnetic
clutch relay operation
signalIgnition switch: ON
A/C switch: ONBelow 1 V
A10-23 (TPH) - A9-29
(SG)B - W-RRear air mix control
damper position sensor
signalIgnition switch: ON
Rear temperature control
dial: MAX. HOT
MAX.
COLD1.0 to 4.0 V
A10-24 (TPM) - A9-29
(SG)G - W-RRear air outlet control
damper position sensor
signalIgnition switch: ON
Rear mode control switch:
FOOT
FACE1.0 to 4.0 V Terminal No.
(Symbols)Wiring Color Description Condition Specified Condition
E106664E04
Item Contents
Terminal No.
(Symbols)A9-12 (SOL+) - A9-6 (GND)
Tool Setting 5 V/DIV., 500
s/DIV.
Vehicle ConditionEngine is running
A/C switch: ON
Front blower control dial: LO

Page 2909 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AC–168AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Manual Air Conditioning System)
AC
(b) Waveform 2:
E116941E04
Item Contents
Terminal No.
(Symbols)A10-2 (LOCK) - A9-30 (SG-6)
Tool Setting 2

Page 2910 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AC–16AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
CHECK MODE PROCEDURE
1. LIST OF OPERATION METHODS
By operating each of the A/C control switches as sh

Page 2911 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–17
AC
E109264E10

Page 2912 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AC–168AIR CONDITIONING – REFRIGERANT
AC
REFRIGERANT
ON-VEHICLE INSPECTION
1. INSPECT REFRIGERANT PRESSURE WITH
MANIFOLD GAUGE SET
(a) This method uses a manifold gauge set to locate
problem ar

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